Hello, I would like to discuss about licence problems with usage of LDAC encoder libldac in pulseaudio. LDAC is a codec used by some Sony bluetooth headsets and it would be nice to have support for it after my patch series for Modular API for A2DP codecs is merged. There is only one released LDAC encoder. It is libldac which can be found at: https://android.googlesource.com/platform/external/libldac/ It is licensed under Apache License Version 2.0. If I understood correctly pulseaudio is licensed under LGPL v2.1 or later with some exceptions when some optional GPL dependences are enabled then server part is licensed under GPL v2 or later. So it can be distributed under GPL v3, right? Please correct me if I'm wrong. According to FSF https://www.gnu.org/licenses/license-list.html#apache2 Apache License Version 2.0 is compatible with GPL v3, but is incompatible with GPL v2. So, would it be feasible to write LDAC specific code for pulseaudio under GPL v3 license (in separate files) and make compile time option to enable/disable GPL v3 LDAC support? When enabled it would mean that compiled binary of puleaudio server and server modules are forced to be distributed under GPL v3 and thanks to compatibility with Apache License Version 2.0, it would be possible to use libdac library. When disabled then it would be like before (without LDAC and with license like before). Am I correct? -- Pali Rohár pali.rohar@xxxxxxxxx
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